摘要
为改善方钢管混凝土柱受力后钢管容易发生屈曲的缺陷,使用设缝钢管代替通长钢管制作相关构件并进行了轴向压力实验对两类试件的力学性能进行研究。通过研究发现钢管设缝后不承受轴向荷载作用、不发生屈曲。随着荷载增加,钢管对核心混凝土的约束效果明显,荷载位移曲线上构件B表现出良好的延性;构件B的承载力略低于构件A。实验后剖开构件发现,核心混凝土表现为被压溃破坏,但在外部钢管约束下,压溃后的构件依然能够承受荷载。相关试验现象说明设缝后钢管对核心混凝土的约束作用更明显,改善了混凝土的受力特点,核心混凝土在外部钢管的约束作用下不但核心承载力得到了进一步提高,还表现出了良好的延性。
In order to improve the defect that the concrete-filled square steel tubular column is prone to buckling under stress,the author uses the slotted steel pipe instead of the full-length steel pipe to make relevant members and carry out axial compression members,and carries out axial pressure tests to study the mechanical properties of the two kinds of specimens.It is found that the steel pipe does not bear axial load and does not buckle after the joint is set.With the increase of the load,the steel pipe has obvious restraint effect on the core concrete,and the member B on the load displacement curve shows good ductility.The capacity of member B is slightly lower than that of member A.After the test,it is found that the core concrete is crushed and destroyed,but the crushed member can still bear the load under the constraint of the external steel pipe.The experimental results show that the steel pipe has a more obvious constraint effect on the core concrete,which improves the stress characteristics of concrete.Under the constraint of the external steel pipe,the core concrete not only has a further increase in the core bearing capacity but also shows a good ductility.
作者
彭培宇
周绍财
朱泽文
梁玉雄
林泽方
Peng Peiyu;Zhou Shaocai;Zhu Zewen;Liang Yuxiong;Lin Zefang(Ganzhou Expressway Co.,Ltd.,Ganzhou Jiangxi 341000,China;Jiangxi Transportation Science Research Institute Co.,Ltd.,Nanchang Jiangxi 330000,China;East China Jiaotong University,Nanchang Jiangxi 330000,China)
出处
《山西建筑》
2025年第2期33-36,共4页
Shanxi Architecture
基金
江西省交通运输厅科技项目(编号:2023C0008)。
关键词
钢管混凝土
设缝
约束模式
力学性能
concrete filled steel tube
seam
constraint mode
mechanical properties
